Alfred siebert



(No Model.)

' A. SIEBERT.

PUMP.

No. 410,458. Patented Sept. 3, 1889.

II I I '1 t v A INVENTOH WITNESSES ATTORNEY N. PETERS. Pmwumu n w. war-m ac.

UNITED STATES PATENT ()EEIcE.

ALFRED SIEBERT, OF NEW YORK, N. Y.

PUMP.

SPECIFICATION forming part of Letters Patent No. 410,458, dated September 3, 1889.

Application filed July 19, 1888- Serial No. 230,414. (No model.)

T 0 all whom, it may concern.-

Be it known that I, ALFRED SIEBERT, a citizen of the United States, and a resident of the city of New York, county and State of New York, have invented certain new and useful Improvements in Pumps, of which the following is such a full, clear, concise, and exact description as will enable others skilled in the art to which my invention appertains to make and use the same, reference being had to the accompanying drawin s, forming part of this specification.

The improvement relates more particularly to that class of pumps employed in connection with gas compressing and refrigerating apparatus; and the object of the invention is to produce a pump of strong and simple construction, into which the oil may be admitted under pressure without danger of its bursting through the valves, and from which the time as well as quantity of the discharge maybe definite and certain, and also a pump which is single as well as double acting, and adapted to be connected with one or two compressors, as the case may be and the invention consists in the devices and combination of devices, as hereinafter more fully described and claimed.

In the accompanying drawings, Figure 1 is a vertical longitudinal sectional view of a pump embodying my improvement; and Figs. 2 and 3 are views in cross-section taken, respectively, 011 the lines A B and (J D of Fig. 1. Fig. 4: is a plan view of the same, showing a portion in horizontal section taken on the line E F of Fig. l.

The chamber A is. provided with two out let or discharge passages a a, and two intermediary inlet-ports a a, connecting with suction-pipe B, for admitting the oil or other liquid, and provided with check-valve Z), to prevent any backward iiow thereof within the chamber A. Somewhat less in length is the cylinder 0, in the sides of which, near each end, are openings 0 c. The piston D,

actuated by suitable connection with the piston-rod (Z, moves within the inner cylinder 0, and, reciprocating back and forth,induces corresponding movement of cylinder 0 from one end to the other of the chamber A, bringing the openings 0 c successively in and out of connection with the adjacent dischargepassages a a and inlet-ports a a The openings 0 0, near each end of the cylinder, are preferably arranged entirely about the circumference, as shown in Fig. 3, so that no turning or rotary motion of the cylinder will throw them out of position, thus dispensing with the need of any guiding grooves or flanges. The ends of the chamber A are also preferably connected with an equalizing-passage f, to allow movement to the oil accumulating therein and without the cylinder, which, if tightly contained, might block the motion of the latter, but, being allowed to flow freely back and forth, simply acts as a cushion to relieve concussion.

As the piston D is drawn forward, the inner cylinder 0 is pressed along in the same direction until one of its outlet-openings 0, near the forward end, is brought in connection with the adjacent discharge-passage in the chamber A and the oil in the cylinder ejected, while at the same time one of the openings 0, near the opposite end, is brought over the adjacent inlet-port and a volume of oil admitted, to be discharged in a similar manner by a backward stroke of the piston.

The discharge-passages a a may be each arranged to connect with a different compressor, and the inlet-pipe B may be provided with connections by which the oil is returned after being discharged from the compressors and separated from the compressed gas in the usual way. If, however, it is found necessary to stop the operation of one of the compressors supplied by the pump independently of the other, the dischargepassage leading thereto may be closed and the pump rendered single-acting by means of the angle-cock E and connecting-passages E E By closing the upper end of the discharge-passage a and turning the cock E into the position shown in Fig. 1, the oil forced out into said discharge-passage a enters the channel 6, and, passing downward through the connecting-channel, is returned again to the cylinder through the inlet-ports. By turning the angle-cock nearly adjoining the same connection will be made with the discharge-passage a, while by turning it in still another position both discharge-passages are cut off from the inlet-ports and the pump again rendered double-acting.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. In a pump, the combination of apistonchamber provided with two discharge-passages and intermediary inlet port or ports, a cylinder having openings in its sides and adapted to move back and forth within said chamber and connect said openings with the discharge-passages and inlet-ports, and a piston provided with a rod adapted to operate the same within said cylinder, whereby both piston and cylinder are given a reciprocatingmot-ion and the oil or other liquid admitted and discharged, substantially as described.

2. In a pump, the combination of a pistonchamber provided with two discharge-passages and intermediary inlet port or ports, a cylinder having Openings in its sides and adapted to move back and forth within said chamber and connect said openings with the discharge-passages and inlet-ports, and a piston provided with a rod adapted to operate the same within said cylinder, said chamber being further provided with channels and connections between said discharge-passages and inlet port or ports and adapted to render said pump single-acting, substantially as described.

3. In a pump, the combination of a pistonchamber provided with two discharge-passages and intermediary inlet port or ports, a cylinder having openings in its sides and adapted tomove back and forth within said chamber and connect said openings with the discharge-passages and inlet-ports, a piston provided with a rod adapted to operate the same within said cylinder, and an equalizingpipe connecting the ends of said chamber, whereby the oil admitted therein and without said cylinder is allowed to flow back and forth, substantially as and for the purpose set forth.

ALFRED SIEBERT.

WVitnesses:

FERDINAND BAUER, R. G. MONROE. 

